Believe me. If you focus on everything, things won’t work out. Here is my advise (another one) to you:

Create your Brand Presence in all popular Social Media – Use a service like NameChk to check if your business name is available in the popular networks. As of this writing, you should cover at least this minimum – Facebook, Twitter, LinkedIn, Quora, Instagram

Choose the Social Media that is suitable for your Business – If your business is around Photography, choose Instagram and Facebook as your primary channels. If you are a career coach, you should have an extra emphasis on LinkedIn. Make your homework and identify networks that can help your business. Set them as your Primary Targets!

Use the 80/20 Rule – 80% of your Social Media campaigns and efforts should focus on the 20% of the networks you chose for the business